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Please consult the NVIDIA driver README and your linux distributions documentation for details on how to correctly disable the Nouveau kernel drive

...inside the README of your driver are...

@milton

Welcome to the forum!

After adding xswat you only made an apt update,you need also a upgrade.

sudo add-apt-repository ppa:ubuntu-x-swat/x-updates
sudo apt-get update
sudo apt-get upgrade
not sure if you need also:...